Hmmm, blame Baltimore I'll bet.
I figure population centers are the big contributors to the 'Islands of blue in a sea of red' phenomena... particularly if said population is comprised of sexual/ethnic minorities or it's a 'university' town.
That's why this county map looks so much more rosy than the electoral (state by state) map.
Baltimore & P G and Montgomery Counties..
ugh!
I searched the whole thread to see if any one picked up on this. What we are seeing is a urban/rural divide in this map.